Switch all the constant strings in graphics code to use the new
variables.
This avoids the cost of instantiating CStrInterns at runtime every
frame.
This was SVN commit r13906.
Make some parts of logger and console thread-safe.
Simplify console: remove special commands; remove prefix for script
commands.
Remove LOG_ONCE, to simplify logger.
Change some code to use the new logger interface.
Fix OOS when revealing map.
Clean up some formatting.
This was SVN commit r8511.
